package com.atguigu.gulimall.order.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.exception.NoStockException;
import com.atguigu.common.to.mq.OrderTo;
import com.atguigu.common.to.mq.SeckillOrderTo;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.order.constant.OrderConstant;
import com.atguigu.gulimall.order.dao.OrderItemDao;
import com.atguigu.gulimall.order.entity.OrderItemEntity;
import com.atguigu.gulimall.order.entity.PaymentInfoEntity;
import com.atguigu.gulimall.order.enume.OrderStatusEnum;
import com.atguigu.gulimall.order.feign.CartFeignService;
import com.atguigu.gulimall.order.feign.MemberFeignService;
import com.atguigu.gulimall.order.feign.ProductFeignService;
import com.atguigu.gulimall.order.feign.WmsFeignService;
import com.atguigu.gulimall.order.interceptor.LoginUserInterceptor;
import com.atguigu.gulimall.order.service.OrderItemService;
import com.atguigu.gulimall.order.service.PaymentInfoService;
import com.atguigu.gulimall.order.to.OrderCreateTo;
import com.atguigu.gulimall.order.vo.*;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import io.seata.spring.annotation.GlobalTransactional;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.aop.framework.AopContext;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.util.*;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.order.dao.OrderDao;
import com.atguigu.gulimall.order.entity.OrderEntity;
import com.atguigu.gulimall.order.service.OrderService;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;


@Service("orderService")
public class OrderServiceImpl extends ServiceImpl<OrderDao, OrderEntity> implements OrderService {

    private ThreadLocal<OrderSubmitVo> confirmVoThreadLocal = new ThreadLocal<>();
    @Autowired
    MemberFeignService memberFeignService;
    @Autowired
    CartFeignService cartFeignService;
    @Autowired
    ThreadPoolExecutor executor;
    @Autowired
    WmsFeignService wmsFeignService;
    @Autowired
    StringRedisTemplate stringRedisTemplate;
    @Autowired
    ProductFeignService productFeignService;
    @Autowired
    OrderItemService orderItemService;
    @Autowired
    RabbitTemplate rabbitTemplate;
    @Autowired
    PaymentInfoService paymentInfoService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<OrderEntity> page = this.page(
                new Query<OrderEntity>().getPage(params),
                new QueryWrapper<OrderEntity>()
        );
        return new PageUtils(page);
    }

    @Override
    public OrderConfirmVo confirmOrder() throws ExecutionException, InterruptedException {
        OrderConfirmVo confirmVo = new OrderConfirmVo();
        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();
        System.out.println("主线程..."+Thread.currentThread().getId());
        //获取之前的请求
        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
        CompletableFuture<Void> getAddressFuture = CompletableFuture.runAsync(() -> {
            //1.远程查询所有的收货地址列表
            System.out.println("member线程..."+Thread.currentThread().getId());
            //每一个线程都来共享之前的请求数据
            RequestContextHolder.setRequestAttributes(requestAttributes);
            List<MemberAddressVo> address = memberFeignService.getAddress(memberRespVo.getId());
            confirmVo.setAddress(address);
        }, executor);

        CompletableFuture<Void> cartFuture = CompletableFuture.runAsync(() -> {
            //2.远程查询购物车所有选中的购物项
            System.out.println("cart线程..."+Thread.currentThread().getId());
            RequestContextHolder.setRequestAttributes(requestAttributes);
            List<OrderItemVo> cartItems = cartFeignService.getCurrentUserCartItems();
            confirmVo.setItems(cartItems);
            //feign在远程调用之前要构造请求 调用很多的拦截器
        }, executor).thenRunAsync(()->{
            List<OrderItemVo> items = confirmVo.getItems();
            List<Long> collect = items.stream().map(item -> item.getSkuId()).collect(Collectors.toList());
            R hashStock = wmsFeignService.getSkusHashStock(collect);
            List<SkuStockVo> data = hashStock.getData(new TypeReference<List<SkuStockVo>>() {
            });
            if (data!=null){
                Map<Long, Boolean> map = data.stream().collect(Collectors.toMap(SkuStockVo::getSkuId, SkuStockVo::getHasStock));
                confirmVo.setStocks(map);
            }
        },executor);

        //3.查询用户积分
        Integer integration = memberRespVo.getIntegration();
        confirmVo.setIntegration(integration);
        //4.其他数据自动计算
        //5.防重令牌
        String token = UUID.randomUUID().toString().replace("-", "");
        confirmVo.setOrderToken(token);
        stringRedisTemplate.opsForValue().set(OrderConstant.USER_ORDER_TOKEN_PREFIX+memberRespVo.getId(),token,30, TimeUnit.MINUTES);
        CompletableFuture.allOf(getAddressFuture,cartFuture).get();
        return confirmVo;
    }

    //下单：去创建订单 验令牌 验价格 锁库存。。。
    @Transactional
    //本地事务 在分布式系统 只能控制住自己的回滚 控制不了其他服务的回滚
    //分布式事务 最大原因。网络问题+分布式机器。
    @Override
    @GlobalTransactional
    public SubmitOrderResponseVo submitOrder(OrderSubmitVo vo) {
        SubmitOrderResponseVo responseVo = new SubmitOrderResponseVo();
        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();
        responseVo.setCode(0);
        confirmVoThreadLocal.set(vo);
        //1.验证令牌【令牌的对比和删除必须表征原子性】0令牌失败 - 1删除成功
        //如果redis中根据key获取的值等于传过来的值就根据key删除redis中存的值 否则返回0
        String script = "if redis.call('get',KEYS[1]) == ARGV[1] then return redis.call('del',KEYS[1]) else return 0 end";
        String orderToken = vo.getOrderToken();
        //原子验证令牌和删除令牌
        Long result = stringRedisTemplate.execute(new DefaultRedisScript<Long>(script, Long.class), Arrays.asList(OrderConstant.USER_ORDER_TOKEN_PREFIX + memberRespVo.getId()), orderToken);
        if (result == 0L){
            //令牌验证失败
            responseVo.setCode(1);
            return responseVo;
        }else {
            //令牌验证成功
            //下单：去创建订单 验令牌 验价格 锁库存。。。
            //1.创建订单 订单项等信息
            OrderCreateTo order = createOrder();
            //2.验价
            BigDecimal payAmount = order.getOrder().getPayAmount();
            BigDecimal payPrice = vo.getPayPrice();
            if (Math.abs(payAmount.subtract(payPrice).doubleValue())<0.01){
                //金额对比成功
                //...
                //3.保存订单
                saveOrder(order);
                //4.库存锁定。只要有异常回滚订单数据
                WareSkuLockVo lockVo = new WareSkuLockVo();
                lockVo.setOrderSn(order.getOrder().getOrderSn());

                List<OrderItemVo> locks = order.getOrderItems().stream().map(item -> {
                    OrderItemVo itemVo = new OrderItemVo();
                    itemVo.setSkuId(item.getSkuId());
                    itemVo.setCount(item.getSkuQuantity());
                    itemVo.setTitle(item.getSkuName());
                    return itemVo;
                }).collect(Collectors.toList());
                lockVo.setLocks(locks);
                //远程锁库存
                //库存成功了 但是网络原因返回响应超时了 订单回滚 库存不回滚
                R r = wmsFeignService.orderLockStock(lockVo);
                if (r.getCode() == 0){
                    //锁成功了
                    responseVo.setOrder(order.getOrder());
                    //远程扣减积分 出异常
                    //int i = 10/0;//订单回滚 库存不滚
                    //订单创建成功给MQ发送消息
                    rabbitTemplate.convertAndSend("order-event-exchange","order.create.order",order.getOrder());
                    return responseVo;
                }else {
                    //锁定失败
                    String msg = (String) r.get("msg");
                    throw new NoStockException(msg);
                }
            }else {
                responseVo.setCode(2);
                return responseVo;
            }
        }
//        String redisToken = stringRedisTemplate.opsForValue().get(OrderConstant.USER_ORDER_TOKEN_PREFIX + memberRespVo.getId());
//        if (orderToken!=null && orderToken.equals(redisToken)){
//            //令牌验证通过
//            stringRedisTemplate.delete(OrderConstant.USER_ORDER_TOKEN_PREFIX + memberRespVo.getId());
//        }else {
//            //不通过
//        }
    }

    @Override
    public OrderEntity getOrderByOrderSn(String orderSn) {
        OrderEntity order_sn = this.getOne(new QueryWrapper<OrderEntity>().eq("order_sn", orderSn));
        return order_sn;
    }

    @Override
    public void closeOrder(OrderEntity entity) {
        //查询当前这个订单的最新状态
        OrderEntity orderEntity = this.getById(entity.getId());
        if (orderEntity!=null){
            if (orderEntity.getStatus() == OrderStatusEnum.CREATE_NEW.getCode()){
                //如果订单的状态是未付款可以进行关单
                OrderEntity update = new OrderEntity();
                update.setId(entity.getId());
                update.setStatus(OrderStatusEnum.CANCLED.getCode());
                this.updateById(update);
                OrderTo orderTo = new OrderTo();
                BeanUtils.copyProperties(orderEntity,orderTo);
                //订单解锁成功以后再给MQ发送一个消息
                try{
                    // TODO: 2020/11/20  保证消息一定会发送出去 每一个消息都可以做好日志记录（给数据库保存每一个消息的详细信息）
                    // TODO: 2020/11/20  定期扫描数据库将失败的消息再发送一遍
                    rabbitTemplate.convertAndSend("order-event-exchange","order.release.other",orderTo);
                }catch (Exception e){
                    //将发送失败的消息进行重试发送
                }
            }
        }
    }

    @Override
    public PayVo getOrderPay(String orderSn) {
        PayVo payVo = new PayVo();
        OrderEntity order = this.getOrderByOrderSn(orderSn);

        BigDecimal decimal = order.getPayAmount().setScale(2, BigDecimal.ROUND_UP);
        payVo.setTotal_amount(decimal.toString());
        payVo.setOut_trade_no(order.getOrderSn());
        List<OrderItemEntity> order_sn = orderItemService.list(new QueryWrapper<OrderItemEntity>().eq("order_sn", orderSn));
        OrderItemEntity itemEntity = order_sn.get(0);
        payVo.setSubject(itemEntity.getSkuName());
        payVo.setBody(itemEntity.getSkuAttrsVals());
        return payVo;
    }

    @Override
    public PageUtils queryPageWithItem(Map<String, Object> params) {

        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();

        IPage<OrderEntity> page = this.page(
                new Query<OrderEntity>().getPage(params),
                new QueryWrapper<OrderEntity>().eq("member_id",memberRespVo.getId()).orderByDesc("id")
        );
        List<OrderEntity> orderList = page.getRecords().stream().map(order -> {
            List<OrderItemEntity> itemEntities = orderItemService.list(new QueryWrapper<OrderItemEntity>().eq("order_sn", order.getOrderSn()));
            order.setItemEntities(itemEntities);
            return order;
        }).collect(Collectors.toList());
        page.setRecords(orderList);
        return new PageUtils(page);
    }

    /**
     * 处理支付宝的处理结果
     * @param vo
     * @return
     */
    @Override
    public String handlePayResult(PayAsyncVo vo) {
        //1.保存交易流水
        PaymentInfoEntity infoEntity = new PaymentInfoEntity();
        infoEntity.setAlipayTradeNo(vo.getTrade_no());
        infoEntity.setOrderSn(vo.getOut_trade_no());
        infoEntity.setPaymentStatus(vo.getTrade_status());
        infoEntity.setCallbackTime(vo.getNotify_time());
        paymentInfoService.save(infoEntity);
        //2.修改订单的状态信息
        if(vo.getTrade_status().equals("TRADE_SUCCESS")||vo.getTrade_status().equals("TRADE_FINISHED")){
            //支付成功状态
            String outTradeNo = vo.getOut_trade_no();
            this.baseMapper.updateOrderStatus(outTradeNo,OrderStatusEnum.PAYED.getCode());
        }
        return "success";
    }

    @Override
    public void createSeckillOrder(SeckillOrderTo seckillOrder) {
        // TODO: 2020/11/29 保存订单信息
        OrderEntity orderEntity = new OrderEntity();
        orderEntity.setOrderSn(seckillOrder.getOrderSn());
        orderEntity.setMemberId(seckillOrder.getMemberId());
        orderEntity.setStatus(OrderStatusEnum.CREATE_NEW.getCode());
        BigDecimal multiply = seckillOrder.getSeckillPrice().multiply(new BigDecimal("" + seckillOrder.getNum()));
        orderEntity.setPayAmount(multiply);
        this.save(orderEntity);
        // TODO: 2020/11/29 保存订单项信息
        OrderItemEntity itemEntity = new OrderItemEntity();
        itemEntity.setOrderSn(seckillOrder.getOrderSn());
        itemEntity.setRealAmount(multiply);
        // TODO: 2020/11/29 获取当前SKU的详细信息进行设置
        itemEntity.setSkuQuantity(seckillOrder.getNum());
        orderItemService.save(itemEntity);
    }

    /**
     * 保存订单数据
     * @param order
     */
    private void saveOrder(OrderCreateTo order) {
        OrderEntity orderEntity = order.getOrder();
        orderEntity.setModifyTime(new Date());
        this.save(orderEntity);

        List<OrderItemEntity> orderItems = order.getOrderItems();
        orderItemService.saveBatch(orderItems);
    }

    private OrderCreateTo createOrder(){
        OrderCreateTo createTo = new OrderCreateTo();
        //1.生成订单号
        String orderSn = IdWorker.getTimeId();
        //创建订单号
        OrderEntity orderEntity = buildOrder(orderSn);

        //2.获取到所有的订单项
        List<OrderItemEntity> itemEntities = buildOrderItems(orderSn);

        //3.计算价格、积分等相关信息
        computePrice(orderEntity,itemEntities);
        createTo.setOrder(orderEntity);
        createTo.setOrderItems(itemEntities);
        return createTo;
    }

    private void computePrice(OrderEntity orderEntity, List<OrderItemEntity> itemEntities) {
        BigDecimal total = new BigDecimal("0.0");

        BigDecimal coupon = new BigDecimal("0.0");
        BigDecimal integration = new BigDecimal("0.0");
        BigDecimal promotion = new BigDecimal("0.0");
        BigDecimal gift = new BigDecimal("0.0");
        BigDecimal growth = new BigDecimal("0.0");
        //订单的总额 叠加每一个订单项的总额信息
        for (OrderItemEntity itemEntity : itemEntities) {
            BigDecimal realAmount = itemEntity.getRealAmount();
            coupon = coupon.add(itemEntity.getCouponAmount());
            integration = integration.add(itemEntity.getIntegrationAmount());
            promotion = promotion.add(itemEntity.getPromotionAmount());
            total = total.add(realAmount);
            gift = gift.add(new BigDecimal(itemEntity.getGiftIntegration().toString()));
            growth = growth.add(new BigDecimal(itemEntity.getGiftGrowth().toString()));
        }
        //1.订单价格相关
        orderEntity.setTotalAmount(total);
        //应付金额(订单价格+运费)
        orderEntity.setPayAmount(total.add(orderEntity.getFreightAmount()));
        //打折优惠价格
        orderEntity.setPromotionAmount(promotion);
        //积分优惠价格
        orderEntity.setIntegrationAmount(integration);
        //优惠券优惠价格
        orderEntity.setCouponAmount(coupon);
        //设置积分
        orderEntity.setIntegration(gift.intValue());
        //设置成长值
        orderEntity.setGrowth(growth.intValue());
        //设置删除状态 默认是 0：未删除
        orderEntity.setDeleteStatus(0);
    }

    private OrderEntity buildOrder(String orderSn) {
        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();
        OrderEntity entity = new OrderEntity();
        entity.setOrderSn(orderSn);
        //获取收货地址信息
        OrderSubmitVo submitVo = confirmVoThreadLocal.get();
        R fare = wmsFeignService.getFare(submitVo.getAddrId());
        FareVo fareResp = fare.getData(new TypeReference<FareVo>() {
        });
        //设置会员Id
        entity.setMemberId(memberRespVo.getId());
        //设置运费信息
        entity.setFreightAmount(fareResp.getFare());
        //设置收货人信息
        entity.setReceiverCity(fareResp.getAddress().getCity());
        entity.setReceiverDetailAddress(fareResp.getAddress().getDetailAddress());
        entity.setReceiverName(fareResp.getAddress().getName());
        entity.setReceiverPhone(fareResp.getAddress().getPhone());
        entity.setReceiverPostCode(fareResp.getAddress().getPostCode());
        entity.setReceiverProvince(fareResp.getAddress().getProvince());
        entity.setReceiverRegion(fareResp.getAddress().getRegion());

        //设置订单的相关状态信息
        entity.setStatus(OrderStatusEnum.CREATE_NEW.getCode());
        return entity;
    }

    /**
     * 构建所有订单项数据
     * @return
     */
    private List<OrderItemEntity> buildOrderItems(String orderSn) {
        //最后确定每个购物项的价格
        List<OrderItemVo> currentUserCartItems = cartFeignService.getCurrentUserCartItems();
        if (currentUserCartItems!=null && currentUserCartItems.size()>0){
            List<OrderItemEntity> itemEntities = currentUserCartItems.stream().map(cartItem -> {
                OrderItemEntity itemEntity = buildOrderItem(cartItem);
                itemEntity.setOrderSn(orderSn);
                return itemEntity;
            }).collect(Collectors.toList());
            System.out.println("itemEntities->"+itemEntities);
            return itemEntities;
        }
        return null;
    }

    /**
     * 构建某一个订单项
     * @param cartItem
     * @return
     */
    private OrderItemEntity buildOrderItem(OrderItemVo cartItem) {
        OrderItemEntity itemEntity = new OrderItemEntity();
        //1.订单信息:订单号
        //2.商品的SPU信息
        Long skuId = cartItem.getSkuId();
        R r = productFeignService.getSpuInfoBySkuId(skuId);
        SpuInfoVo data = r.getData(new TypeReference<SpuInfoVo>() {
        });
        itemEntity.setSpuId(data.getId());
        itemEntity.setSpuBrand(data.getBrandId().toString());
        itemEntity.setSpuName(data.getSpuName());
        itemEntity.setCategoryId(data.getCatalogId());
        //3.商品的SKU信息
        itemEntity.setSkuId(skuId);
        itemEntity.setSkuName(cartItem.getTitle());
        itemEntity.setSkuPic(cartItem.getImage());
        itemEntity.setSkuPrice(cartItem.getPrice());
        String skuAttr = StringUtils.collectionToDelimitedString(cartItem.getSkuAttr(), ";");
        itemEntity.setSkuAttrsVals(skuAttr);
        itemEntity.setSkuQuantity(cartItem.getCount());
        //4.优惠信息【不做】
        //5.积分成长值信息
        itemEntity.setGiftGrowth(cartItem.getPrice().multiply(new BigDecimal(cartItem.getCount())).intValue());
        itemEntity.setGiftIntegration(cartItem.getPrice().multiply(new BigDecimal(cartItem.getCount())).intValue());
        //6.订单项的价格信息
        itemEntity.setPromotionAmount(new BigDecimal("0"));
        itemEntity.setCouponAmount(new BigDecimal("0"));
        itemEntity.setIntegrationAmount(new BigDecimal("0"));
        //当前订单项的实际金额 总额-各种优惠
        BigDecimal orign = itemEntity.getSkuPrice().multiply(new BigDecimal(itemEntity.getSkuQuantity().toString()));
        BigDecimal subtract = orign.subtract(itemEntity.getPromotionAmount()).subtract(itemEntity.getCouponAmount()).subtract(itemEntity.getIntegrationAmount());
        itemEntity.setRealAmount(subtract);
        return itemEntity;
    }

    //同一个对象内事务方法互调默认失效 原因：绕过了代理对象
    //事务使用代理对象来控制的
    @Transactional(timeout = 30) //a事务的所有设置就传播到了和它公用一个事务的方法
    public void a(){
        //b c 做任何设置都没有用 都是和a公用一个事务
        //this.b(); 没用
        //this.c(); 没用
        //同一个service方法互调的还想使用事务的设置用下面这种代理对象方法实现
        OrderServiceImpl orderService  = (OrderServiceImpl) AopContext.currentProxy();
        orderService.b();
        orderService.c();
    }
    @Transactional(propagation = Propagation.REQUIRED,timeout = 2)
    public void b(){

    }
    @Transactional(propagation = Propagation.REQUIRES_NEW,timeout = 20)
    public void c(){

    }
}